Probability - Maths

Two dice are thrown once. If it is known that the sum of the numbers on the dice was less than 6 the probability of getting a sum 3 is

Three balls are drawn from a bag containing 2 red and 5 black balls, if the random variable X represents the number of red balls drawn, then X can take values

Let A and B be two given independent events such that P(A) =p and P(B) = q and P(exactly one of A, B) = , then value of 3p + 3q

If P(A ∩ B) = 70% and P(B) = 85%, then P(A/B) is equal to

Let A and B be two given events such that P(A) = 0.6, P(B) = 0.2 and P(A/B) = 0.5. Then P(A'/B') is